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10. 5H ACKNOWLEDGEMENTS 



We wish to acknowledge two persons who contributed signifi- 

 cantly to the development of the instrumentation described in this 

 bulletin. Appreciation is expressed to Richard Sweet, Research 

 Project Engineer, Instrumentation Center, University of New 

 Hampshire who designed the unijunction transistor oscillator 

 assembly and provided technical assistance and advice for wiring 

 the components and to Charles Smith, Research Support Specialist, 

 Dept. of Plant Pathology, New York Agricultural Experiment Sta- 

 tion, Cornell University, Geneva, N.Y. who developed the solenoid 

 attachment assembly that we have incorporated into the three-pen 

 arm hygrothermograph. 



The development of this instrumentation was supported by the 

 New Hampshire Agricultural Experiment Station through the 

 Hatch Project 197 entitled "Epidemiology and Control of Diseases of 

 Horticultural Crops" and by the Cooperative Extension Service 

 through the New Hampshire Integrated Pest Management Project. 



Programs of the New Hampshire Agricultural Experiment Station are open to all 

 persons without regard to race, color, national origin or sex. The University of New 

 Hampshire is an Affirmative Action/Equal Opportunity Employer. 



